According to this guy, there are no Kardeshev Type 3 civs out there.
He doesn’t seem to address the galactic quenching question, just uses a complete collection scenario
Type III Societies (Apparently) Do Not Exist
http://arxiv.org/abs/1604.07844
Oh, and don’t use the “more than the atoms than in the universe” analogy lightly
http://norvig.com/atoms.html
According to this guy, there are no Kardeshev Type 3 civs out there.
He doesn’t seem to address the galactic quenching question, just uses a complete collection scenario
Type III Societies (Apparently) Do Not Exist
http://arxiv.org/abs/1604.07844
Oh, and don’t use the “more than the atoms than in the universe” analogy lightly
http://norvig.com/atoms.html